The meteorites provide an excellent grouping mechanism, very natural and the event is co-operative. There is also a hang out down time for people to chat while at the Astralarium, something I think was missing from HoT events (and I saw this commented on as being good for socialising). And when it turned out to be a large number waiting for meteors moving on to a meta afterwards was perfect.
Really solid design on these meteors, Istan is one of the best maps in game. Hope this standard is maintained.